The Short Version
This claim reflects a well-established consensus in classical literary scholarship, supported unanimously across all available sources including institutionally credible ones such as the Yale Teachers Institute and Opera Philadelphia (citing Aristotle's Poetics). The chorus in Oedipus Rex is consistently described as representing the Theban elders — a community voice — that comments on events and shapes audience interpretation. The minor caveat that the chorus reacts alongside the audience rather than from a position of omniscience does not undermine the claim's core accuracy.